Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia
Authors: Tanzi L., Maloberti J.G., Biagioni G., Fioretti A., Gabbanini C., Modugno G.
Autors Affiliation: CNR-INO, Sede Secondaria di Pisa, Pisa, 56124, CNR-INO, Sede Secondaria di Pisa, 56124 Pisa, Italy; LENS, Dipartimento di Fisica e Astronomia, Universita di Firenze, Sesto Fiorentino, 50019, Italy
Abstract: A key manifestation of superfluidity in liquids and gases is a reduction of the moment of inertia under slow rotations. Nonclassical rotational effects have also been considered in the context of the elusive supersolid phase of matter, in which superfluidity coexists with a lattice structure. Here, we show that the recently discovered supersolid phase in dipolar quantum gases features a reduced moment of inertia. Using a dipolar gas of dysprosium atoms, we studied a peculiar rotational oscillation mode in a harmonic potential, the scissors mode, previously investigated in ordinary superfluids. From the measured moment of inertia, we deduced a superfluid fraction that is different from zero and of order of unity, providing direct evidence of the superfluid nature of the dipolar supersolid.
Volume: 371 (6534) Pages from: 1162 to: 1165
More Information: This work was supported by the EC-H2020 research and innovation program (grant no. 641122 – QUIC).KeyWords: superfluidityDOI: 10.1126/science.aba4309Citations: 36data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-09-17References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here